AST to HKT Converter & Meeting Planner
Quick answer: 9:00 AM AST = 9:00 PM HKT (fixed -04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Atlantic Standard Time (AST) and Hong Kong Time (HKT)? You need to account for the standard time difference. Hong Kong Time is normally 12 hours ahead of Atlantic Standard Time. Whether you are coordinating between teams in Halifax and San Juan and Hong Kong and Kowloon, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM AST = 12:00 PM HKT. The full 24-hour AST to HKT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AST = 3:00 AM HKT (+1 day).
| AST Time | HKT Time |
|---|---|
| 12:00 AM (00:00) | 12:00 PM (12:00) |
| 1:00 AM (01:00) | 1:00 PM (13:00) |
| 2:00 AM (02:00) | 2:00 PM (14:00) |
| 3:00 AM (03:00) | 3:00 PM (15:00) |
| 4:00 AM (04:00) | 4:00 PM (16:00) |
| 5:00 AM (05:00) | 5:00 PM (17:00) |
| 6:00 AM (06:00) | 6:00 PM (18:00) |
| 7:00 AM (07:00) | 7:00 PM (19:00) |
| 8:00 AM (08:00) | 8:00 PM (20:00) |
| 9:00 AM (09:00) | 9:00 PM (21:00) |
| 10:00 AM (10:00) | 10:00 PM (22:00) |
| 11:00 AM (11:00) | 11:00 PM (23:00) |
| 12:00 PM (12:00) | 12:00 AM (00:00)+1 day |
| 1:00 PM (13:00) | 1:00 AM (01:00)+1 day |
| 2:00 PM (14:00) | 2:00 AM (02:00)+1 day |
| 3:00 PM (15:00) | 3:00 AM (03:00)+1 day |
| 4:00 PM (16:00) | 4:00 AM (04:00)+1 day |
| 5:00 PM (17:00) | 5:00 AM (05:00)+1 day |
| 6:00 PM (18:00) | 6:00 AM (06:00)+1 day |
| 7:00 PM (19:00) | 7:00 AM (07:00)+1 day |
| 8:00 PM (20:00) | 8:00 AM (08:00)+1 day |
| 9:00 PM (21:00) | 9:00 AM (09:00)+1 day |
| 10:00 PM (22:00) | 10:00 AM (10:00)+1 day |
| 11:00 PM (23:00) | 11:00 AM (11:00)+1 day |
Best time to call Hong Kong from Halifax
For most work calls, compare the normal business day in Halifax (AST) with the business day in Hong Kong (HKT). AST commonly covers North America, Caribbean, while HKT is mainly associated with East Asia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 10:00 PM AST, which reaches 9:00 AM HKT near the start of their workday.
- DST Safety: AST or HKT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Hong Kong Stock Exchange (HKEX): 09:30-16:00 local time in Hong Kong.
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Frequently Asked Questions
What is the time difference between AST and HKT?
During standard time, Hong Kong Time is 12 hours ahead of Atlantic Standard Time.
Does the Caribbean observe Daylight Saving Time?
The vast majority of Caribbean nations and territories — including Puerto Rico, the Dominican Republic, the US Virgin Islands, Trinidad and Tobago, and Barbados — do not observe Daylight Saving Time and remain on AST (UTC-4) year-round. This means these territories share the same clock as Halifax only during the Atlantic Standard Time window in winter, diverging by one hour once Canada and Bermuda advance to ADT each spring.
What is the difference between AST and ADT?
AST (Atlantic Standard Time) is the standard winter offset at UTC-4:00, observed from the first Sunday in November through the second Sunday in March across all AST regions. ADT (Atlantic Daylight Time) is the summer offset at UTC-3:00, applied by Eastern Canadian provinces and Bermuda when they advance their clocks by one hour during Daylight Saving Time.
Does Hong Kong observe Daylight Saving Time?
Hong Kong does not observe Daylight Saving Time and has not done so since 1979, remaining permanently fixed at UTC+8:00 throughout the year. This means the offset between Hong Kong and any DST-observing country shifts by one hour twice annually when those countries change their clocks — but HKT itself never moves.
Are HKT and SGT the same time?
Yes, Hong Kong Time (HKT) and Singapore Time (SGT) share the identical UTC+8:00 offset, and neither territory observes Daylight Saving Time, making the two cities permanently synchronized on the same clock year-round. The same alignment holds with mainland China (CST), Taiwan, Malaysia (MYT), and Western Australia (AWST) — placing Hong Kong and Singapore at the heart of the world's largest permanent UTC+8 economic bloc.